IJK interface diagrams.

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Dbug
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Re: IJK interface diagrams.

Post by Dbug »

This kind of reminds me of the Atari ST dedicated joystick interface for Gauntlet to allow for four players are the same time: Two on the original ports of the machine, and two on the parallel port interface :)
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kenneth
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Re: IJK interface diagrams.

Post by kenneth »

I'll try to use the same system with more transistors to use the unused mapping combinations of the joysticks, in the end, 4 Atari-type joystick could be connected, or two "combo" joystick type. (8 directions, 6 buttons, and START-SELECT each)
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Symoon
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Re: IJK interface diagrams.

Post by Symoon »

jbperin wrote: Tue Nov 16, 2021 11:12 pm This really makes think of a Battle Zone For Oric because the arcade version had two joysticks !!
The standard PASE interface already had two joysticks ports ;)
The only software I know that took advantage of it were:
- the demo program going with the interface (TRON-like game), allowing 2 players on joystick
- Harrier Attack using "Joystick adapter" program, using the 2nd joystick button to fire one of the two weapons
- "joystick adapter 2" also mentions Light Cycle, but I never tested it (2 players are possible I guess)

From what I read on the forum, the standard IJK interface also allowed 2 joystiks (but I'll let experts confirm this)
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kenneth
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Re: IJK interface diagrams.

Post by kenneth »

The IJK interface use the same way to work, bit7 bit6 to select jost1 or jost2, except these:
-If STROBE is ON, the interface is not readable on the printer port.
-If STROBE is OFF, we can read the state of one of the joystick for a SHORT time, the code must read the values just after setting STROBE off, otherwise, the values disappear, I did'nt verified if the emulator consider this, it could be problematic when the programmed game is tried on a real machine...
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kenneth
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Re: IJK interface diagrams.

Post by kenneth »

ImageImage


The "factory mode" pcb.
It works great. :wink:
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Symoon
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Re: IJK interface diagrams.

Post by Symoon »

Looks amazing :)
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HigashiJun
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Re: IJK interface diagrams.

Post by HigashiJun »

Great !
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Dom
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Re: IJK interface diagrams.

Post by Dom »

Kenneth, the sorcerer or the new Oric extensions hardware ! :-)
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kenneth
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Re: IJK interface diagrams.

Post by kenneth »

Here is the tutorial :wink:
IKJlite_tuto_EN.zip
(866.27 KiB) Downloaded 21 times
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